const xml2json = require('fast-xml-parser');
const json2xml = new xml2json.j2xParser({form:true})

let data = `<xml>
<appid><![CDATA[wx2421b1c4370ec43b]]></appid>
<attach><![CDATA[支付测试]]></attach>
<bank_type><![CDATA[CFT]]></bank_type>
<fee_type><![CDATA[CNY]]></fee_type>
<is_subscribe><![CDATA[Y]]></is_subscribe>
<mch_id><![CDATA[10000100]]></mch_id>
<nonce_str><![CDATA[5d2b6c2a8db53831f7eda20af46e531c]]></nonce_str>
<openid><![CDATA[oUpF8uMEb4qRXf22hE3X68TekukE]]></openid>
<out_trade_no><![CDATA[1409811653]]></out_trade_no>
<result_code><![CDATA[SUCCESS]]></result_code>
<return_code><![CDATA[SUCCESS]]></return_code>
<sign><![CDATA[B552ED6B279343CB493C5DD0D78AB241]]></sign>
<sub_mch_id><![CDATA[10000100]]></sub_mch_id>
<time_end><![CDATA[20140903131540]]></time_end>
<total_fee>1</total_fee>
<coupon_fee><![CDATA[10]]></coupon_fee>
<coupon_count><![CDATA[1]]></coupon_count>
<coupon_type><![CDATA[CASH]]></coupon_type>
<coupon_id><![CDATA[10000]]></coupon_id>
<coupon_fee><![CDATA[100]]></coupon_fee>
<trade_type><![CDATA[JSAPI]]></trade_type>
<transaction_id><![CDATA[1004400740201409030005092168]]></transaction_id>
</xml>`

let json = xml2json.parse(data)
console.log(json.xml.total_fee)